Skip to content
LLC 101 Guide

Course unit 2 · Colorado

The Colorado Registered Agent Unit (2026): 6 Tasks and the 3 Best Agents

Mainstay Filing ($149 a year), CO Registered Agent.org ($99 a year) and Colorado Registered Agent.co ($99 a year): that is the order of the services we would hire in Colorado in 2026 for naming a registered agent. Over 6 tasks you learn the legal rule, who is eligible, the address test and the way an agent gets named.

Prepared by the LLC 101 Guide instructors

Unit overview

The requirement
Yes
Look it up at sos.state.co.us; our reading dates from October 2026
What recommended services charge
$99 to $149 a year
As each company lists them
Periodic report
$25 a year
Look it up at coloradosos.gov; our reading dates from October 2026
Task count
6
From first to last

Course objectives

  • What Colorado requires of a registered agent
  • Eligibility and address rules
  • How to name or swap the agent
  • How the picks compare

Services we recommend in Colorado

Five weighted criteria set the order (see how we grade), and three-year cost and assignments completed count most.

Top of the class

1. Mainstay Filing: best for one agent in every state

Our first pick$149 yearly, $149 at renewal

Our first pick is Mainstay Filing; $149 per year from a provider that also covers any state you add later.

Three years run $150 higher than with CO Registered Agent.org, but it completes more of the assignments, and the grade pays for that.

What the price covers

  • A registered office in Colorado
  • Free scans of legal papers served on the company, sent the business day they arrive
  • Up to three government letters a year are scanned free
  • Also works for nonprofits, corporations, LPs and LLPs

What works

  • Works in all fifty states
  • Price $149; renews at $149

What to weigh

  • Higher by $50 a year
  • This plan does not file your reports
Visit Mainstay FilingPartner link. We may earn money if you buy.

Top of the class

2. CO Registered Agent.org: best for owners watching the budget

Focused on Colorado$99 yearly, $99 at renewal

Our second choice, CO Registered Agent.org: $99 a year with no bump at renewal, a good match for an LLC that stays in one state.

What the price covers

  • A registered office address
  • Served documents appear online

What works

  • $99 each year, no increase
  • Costs less per year than Mainstay Filing

What to weigh

  • Colorado only; each other state needs its own agent
  • Periodic report stays your job
Visit CO Registered Agent.orgPartner link. We may earn money if you buy.

Top of the class

3. Colorado Registered Agent.co: best for a local alternative

Focused on Colorado$99 yearly, $99 at renewal

Our third choice, Colorado Registered Agent.co: $99 a year with no bump at renewal, a good match for an LLC that stays in one state.

On price, it is level with CO Registered Agent.org.

What the price covers

  • A registered office address
  • Served documents appear online

What works

  • Costs less per year than Mainstay Filing
  • $99 each year, no increase

What to weigh

  • Colorado only; each other state needs its own agent
  • Periodic report stays your job
Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.

The Colorado picks compared

#ServiceAnnual priceRenewal priceThree-year total
1Mainstay Filing$149$149/yr$447Visit Mainstay FilingPartner link. We may earn money if you buy.
2CO Registered Agent.org$99$99/yr$297Visit CO Registered Agent.orgPartner link. We may earn money if you buy.
3Colorado Registered Agent.co$99$99/yr$297Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
Listed prices, read November 13, 2026. State fees do not change with your choice of agent.

The unit, task by task

  1. Task 1

    The Colorado rule in brief

    Every LLC must name a registered agent with an in-state street address.

    Source: Look it up at sos.state.co.us; our reading dates from October 2026

  2. Task 2

    Who can take the role

    A person 18 or older whose home or usual place of business is in Colorado (since July 1, 2025 the person has to hold a Colorado driver's license or ID or otherwise verify residency), or a business entity in good standing with a usual place of business in Colorado. The agent has to consent. Legal source: C.R.S. § 7-90-701.

  3. Task 3

    Learn the registered office rule

    The address has to be a physical address in Colorado, either a home or a usual place of business. P.O. boxes are not accepted.

    With a service, the public record shows its address instead of yours.

  4. Task 4

    Settle on the person or company

    Owners who qualify can name themselves, and the recommended agents charge $99 to $149 each year.

  5. Task 5

    Get the agent listed publicly

    A new company names its agent when it files the Articles of Organization; to replace the agent later, file again with the Colorado Secretary of State.

    Source: Look it up at coloradosos.gov; our reading dates from October 2026

  6. Task 6

    Track the recurring filing

    Mail from the state about the periodic report reaches your registered agent. The filing is $25 every year, due last day of the entity's anniversary month.

    Source: Look it up at coloradosos.gov; our reading dates from October 2026

Colorado agent costs

TaskGoes toSum
Hiring an agentService$99 to $149 a year
Agent renewalService$99 to $149 a year
Periodic reportState office$25 every year
State amounts come from Colorado's official fee schedules (see the sources below); service prices come from each company's site. The three-year state total adds the filing, the reports for years two and three and any minimum tax.

Why the list runs this way

Assignments the price completes settled first place in Colorado. It is worth 31% of the grade, and the other 69% comes from course fee across three years, second-year fee, match with the state syllabus and plain pricing.

Covering all fifty states counted for more than CO Registered Agent.org did under our grading.

Short answers

Is a registered agent a must for Colorado LLCs?

Yes. Every LLC must name a registered agent with an in-state street address.

Can I be my own registered agent?

Yes, if you meet the eligibility and address rules in tasks 2 and 3.

Can I change my registered agent later?

Change whenever you like, through the Colorado Secretary of State, as task 5 describes.

What does a registered agent cost in Colorado?

$99 to $149 per year for the agents listed.

What does the LLC pay the state each year?

The LLC sends in the periodic report for $25 every year.

Which registered agent would you choose?

Mainstay Filing, CO Registered Agent.org and Colorado Registered Agent.co, from highest grade to lowest.

Reading list and sources

  1. Everything about Colorado Secretary of State above traces to sos.state.co.us, a page we reread in August 2026.
  2. Everything about Colorado Secretary of State above traces to sos.state.co.us, a page we reread in August 2026.
  3. Everything about Colorado yearly filing: Periodic report, official source above traces to coloradosos.gov, a page we reread in October 2026.
  4. Everything about Colorado report due date above traces to colorado.public.law, a page we reread in August 2026.
  5. Everything about Colo above traces to sos.state.co.us, a page we reread in August 2026.
  6. Everything about Colorado formation fee: Filing fee, official source above traces to coloradosos.gov, a page we reread in October 2026.
  7. Mainstay Filing: Colorado service page, as seen on November 13, 2026
  8. CO Registered Agent.org: pricing page, as seen on November 13, 2026
  9. Colorado Registered Agent.co: pricing page, as seen on November 13, 2026